Engine



(No Model.)

I. DE GRAF?.

i ENGINE, No. 297,506. 'PatentedApr-- 22, 1884.

NITED STATES ISAAC DE GRAFF, OF DETROIT, MICHIGAN.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 297,506, dated April22, 1884.

Application led October 1, 1883.

To all whom it may concern.-

Be it known that I, ISAAC DE GRAFF, of Detroit, in the county of Wayneand State of Michigan, have invented new and useful Improvements inEngines; and I do hereby declare that the following is afull, clear, andeX- act description thereof, reference being had to the accompanyingdrawings,which formapart of this specification.

This invention relates to certain new and useful improvements in theconstruction of engines.

The invention consists in the peculiar construction of the parts, andthe means employed for adj ustably securing the engine upon its frame,all as more fully hereinafter set forth.

. It has been found difficult in all end-support horizontal engines toso secure them upon their frame that they will not pound or vibrateunder various conditions of work; and the object of my invention is toprovide a means for securing it upon its frame in such a manner as toavoid all lateral and vertical play, while the cylinder is free toexpand and contract horizontally.

Figure -l is a top plan with the cylinder partly broken away. Fig. 2 isan end elevation with one-half of cylinder incross-section.

In the accompanying drawings, which form a part of this specification, Arepresents the base and frame of a horizontal engine, and B thecylinder, the front end of which is rigidly bolted to the frame, as inthe ordinary manner. At the rear end of the frame, and forming anintegral part thereof, IA form the post C, in the top face of which isformed a dovetailed seat with parallel sides.

D is a foot, which is preferably cast as an integral part of thecylinder B, and such foot is provided with inclined iianges a, withparallel faces, and corresponding in form to the dovetail recess or seatof the post C, the lines or faces of these parts being parallel with theaxis of the engine. This foot D rests within the dovetailed recesses inthe the post C, and between their edges I introduce (No model.)

wedges E, the inner faces of which are parallel with the faces of thelianges c, while their outer faces are inclined to form the wedges.rIhese wedges are driven tightly to place, where they are secured to theframe or post C by means of a bolt or bolts, b,which pass through theheads of the wedges and are tapped into the frame.

By this construction and arrangement ot' parts it can readily be seenthat all lateral movement of the cylinder, and all vertical movement,either up or down, is positively avoided,while the cylinder is free toexpand longitudinally, it having the parallel faces of the wedges totravel between. If, after continued use, the wedges should become alittle loose, so as to cause the cylinder to vibrate, the wedges may bereadj usted by turning up the bolts b.

It can readily be seen that instead of providing the wedges with heads,as shown, plates to cover their outer ends may be secured to the frameand accomplish the same end` It willwbe observed that mypostCis formed7o integral with the frame A, and that the foot D is also integral withthe cylinder B, and this foot rests within the recess in the post C,thus forming, as it were, a solid structure with no loose parts tobecome displaced by the working of the engine, as would bc the casewhere the tenons are made separately and attached to the cylinder andwork in recesses in castings attached to the sides of a boiler, as hasheretofore been proposed.

What I claim as my invention is- The connection between an engine andits frame, as herein described, the foot D, engaging by a tenon in anundercut mortise in the post C, and provided with wedges and devices forholding the same, substantially as and for the purposes set forth.

ISAAC DE GBAFF.

'Witnessesr H. S. SPRAGUE, E. W. ANDREWS.

